SUPERNIGHT 12V Dimmer Switch, Dimmer Knob Aluminium Case DC12V-24V 8A Single Channel Knob Dimmer Controller for LED Strip Bulb Lamp Light 5050 3528 5630 Single Color LED Strips

This works great for my LED deck lighting I installed in my soffit around my house. During normal months I leave them on high but when the holiday lights come out I can dial them down for just enough ambient lighting but holiday lights still shine bright. Manual is always better than digital for this application, just set it and forget it. They last between 1-2 years, really not bad for the price. LOVE the fact that changing it is as easy as a screw and plug. No re-wire and I keep an extra on hand for ease.

I used this rheostat to troubleshoot the IPR on a diesel truck. I needed to know if the ipr was working or the PCM was faulty. The ipr worked fine. The rheostat allowed me to operate the ipr like the pcm would, more or less, and also revealed the voltage required to be able to start the engine which I hadn’t been able to do. I did have to make a pigtail for the ipr from an old harness and then wire it up through the rheostat. I’ll put this one in my tool box and get another for future uses. Being able to vary dc voltage isn’t easy and sometimes it’s necessary.

I bought the plastic version of this before from another vendor for a similar price and was impressed. So I tried this metal version that looks identical to the plastic one.... and it is identical, just in metal. No flicker, nice removable connector, very good dimming range, clear labeling, easy to mount, smooth control, energy efficient, great price. Have been using them 24x7 for months with no issue so far. About the only thing I can think of to improve it would be if the box were smaller/thinner.UPDATE: Of the 4 I ordered, one of them went defective after just a month of use- it got stuck between 80 and 90% brightness. So I have lowered my rating from 5 stars to 4. I ordered a few more spares, it is still not a bad deal.... just keep in mind that they might not be as reliable as you hope.

I took a chance and so far I can recommend this dimmer. I received it recently and wired a mock up to test it before installing to see if it'll work with my high end & expensive Waveform Lighting LED strip and some Amazon components (Lustaled 20W LED 24v Switching Converter and Thinkbee Wireless Light Switch Kit).The dimmer was easy to wire up, there was no humming noise, it was silent through the whole range, was able to get full brightness, good modulation through dim range and dims down to approx. 10%-20%, before the light turns off. The second pic has a dimension measurement drawing measured off the one I received. The aluminum knob feels nice and turns smoothly. For $9.00 it's very hard to beat. The metal housing is solid. FYI: total height of dimmer housing including knob is 1.840", w/o knob: 1.177"The last three pics shows different dimmer range (lowest, approx 40%, full 100% power)TBH, I was surprised they all worked well together, a wireless AC on/off switch wired to a small led transformer, to the dimmer feeding 24v going to my 3 foot long full spectrum high 96 CRI 17w/1350 lumens led strip. Its an awesome set up. This will be for an under cabinet lighting a stove top once the aluminum housing/diffuser arrives. PS: Check out Waveform lighting, it's worth it and has twice the lumens per foot than the similar high CRI ones you can get here.I will update this review after using if there's any issues.

Very nicely made (the case looks like professional quality). Full range of adjustment from full bright down past the point where LEDs cease emitting light. Does not have a click off but the electricity transmitted at the minimum setting is barely measurable and effectively OFF. Connection block is convenient for wiring hookup. Mounts to underside of kitchen cabinets easily with the four mounting holes (use #6 screws). There's a lot of empty space inside case and the knob is a bit tall... could be made much smaller to be more easily hidden. I put this underneath cabinets in the very back and they don't show (unless you're sitting down, they everything else shows too). I chose this after five of the cheap digital remotes/controllers had failed. Assuming these components are reasonably good quality this should last for many years. I came to the realization that a simple PWM controller with knob is not only more reliable but is also actually more convenient than a remote -- no need to keep up with the remote, no batteries to change, and much less chance of failure. You will know exactly where the knob is located so it's easy enough to reach under the cabinet and turn the knob to adjust the under-cabinet lighting brightness. In actual use, you will find the ideal brightness level and then rarely change it.

I love these - I have used several of them to adjust the brightness of various LED strips in our house and RV, and they work great. The minimum-brightness setting is "dimmer" on this unit than on a different brand I bought on Amazon that was a couple of bucks cheaper, and that unit had a less-robust plastic case, so I'll be sticking with these from now on.

Works fine however I was trying to use it for a video photography project and didn't realize that the PMW frequency is too low for my purpose so I ended up having substantial flicker in my videos with this dimmer. Someone in the questions section apparently measured the frequency to be between 200 and 1000 Hz. This is fine for normal lighting projects (I didn't see any flicker by eye) but for certain video applications this might be too low. I ended up using an Arduino to control my LEDs and was able to run them at about 7800hz which fixed my flicker problem.

This thing worked great for a while but it is bulky and ugly. Then out of nowhere it started flickering and wouldn't allow the lights to go above 50% brightness. Opened it up to find the potentiometer had built up carbon deposits on it. I was only running it at 1/2 the rated load. I bought a glass panel touchscreen dimmer to replace it for $4 more and I am much happier.